Subject :NSO Class : Class 3
Class : Class 3
The group listing items that can replace R is Option B. The marking P Q R above the options is an error which we regret and will correct as soon as possible. Thanks for bringing it to our notice.
Class : Class 5
The question is which can replace R. according to the flow chart /r doesn't have definite shape nor volume. So it should be a gas or vapour. the option B has all the items in the form of gas, oxygen, hydrogen and watervapour and is the right answer.
Subject :NSO Class : Class 5
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Subject :NSO Class : Class 7
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Subject :NSO Class : Class 5
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Subject :NSO Class : Class 8
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Subject :NSO Class : Class 8
Ans 3:
Class : Class 8
X can be the harmful and toxic wastes.so as they are released and again gain concentration,the quantity of aquatic animals decrease.Otherwise it was on an increase as the pollution was discharged.
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Subject :NSO Class : Class 8
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Subject :NSO Class : Class 8
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 4